JP2016201210A - lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp having less unevenness of luminance in a circumferential direction of the lamp, having high efficiency and taking advantage of enlarging light flux.SOLUTION: A lamp 1A includes a central light-emitting section 4 having a light-emitting element, and three or more side surface light-emitting units 5 having a light-emitting element. The three or more side surface light-emitting units 5 are arranged around the central light-emitting section 4 and with an interval therebetween so as to make its light-emitting surface face outside. Light emitted from the central light-emitting unit 4 is radiated through the interval between the side surface light-emitting unit 5. The central light-emitting section 4 includes a plurality of central light-emitting units 8.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lamp.

  Development of high-luminance LED lamps that can replace HID (High Intensity Discharged) lamps (for example, mercury lamps) that are mounted on outdoor or indoor lighting fixtures (street lighting fixtures, street lighting fixtures, high ceiling fixtures, etc.) (For example, refer to Patent Document 1). This is due to requests from the viewpoints of energy saving, long life, and environmental resistance.

International Publication No. 2013/069446 JP 2008-135210 A JP 2011-228167 A

  In the lamp of Patent Document 1, a plurality of LED light emitting units are arranged with the light emitting surface facing outward. Since this lamp does not emit light from the position between the LED light emitting units, the luminance unevenness is large. For this reason, when attaching and using the lamp of Patent Document 1 on a street lighting device having a milky white translucent cover, there is a problem that the position between the LED light emitting units appears dark on the cover. .

  In Patent Document 2, a plurality of bulbs of a fluorescent lamp are arranged around a columnar light guide that guides the light of an LED, and light emitted from the side surface of the light guide is emitted from between the bulbs outward. A configuration for emitting light is disclosed. In the lamp of Patent Document 2, most of the light emitted from the side surface of the light guide strikes the bulb of the fluorescent lamp and is lost due to multiple reflection. In addition, since a fluorescent lamp is used, it is difficult to meet demands from the viewpoints of energy saving, long life, and environmental resistance.

  Patent Document 3 discloses an illumination device that uses a light guide for a main light emitting portion. When a light guide is used for the main light emitting part, the light loss is large. For this reason, it is difficult to realize a high-efficiency lamp with a large luminous flux.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lamp that is less uneven in luminance in the circumferential direction of the lamp, has high efficiency, and is advantageous for increasing the luminous flux.

  A lamp according to the present invention includes a central light emitting unit having a light emitting element and three or more side light emitting units having a light emitting element, and the three or more side light emitting units are arranged around each other around the central light emitting unit. The light emitting surface is arranged outward with a space therebetween, and the light emitted from the central light emitting unit is emitted through the side light emitting units.

  According to the present invention, light emitted from the central light emitting unit is radiated through between the side light emitting units, thereby reducing unevenness in luminance in the circumferential direction of the lamp and improving efficiency and increasing the luminous flux. It is possible to provide a simple lamp.

It is the perspective view which looked at the lamp | ramp of Embodiment 1 of this invention from the diagonal front end side. It is the perspective view which abbreviate | omitted illustration of the front end side support body of the lamp | ramp shown in FIG. It is the perspective view which abbreviate | omitted illustration of the front end side support body and side light-emitting unit of the lamp | ramp shown in FIG. It is the figure which abbreviate | omitted illustration of the front end side support body and side surface light emission unit of the lamp | ramp which were shown in FIG. 1, and was seen from the front end side. It is the perspective view which looked at the lamp | ramp of Embodiment 2 of this invention from the diagonal front end side. It is the perspective view which looked at the lamp | ramp of Embodiment 3 of this invention from the diagonal front end side. It is the perspective view which looked at the lamp | ramp of Embodiment 4 of this invention from the diagonal front end side. It is a disassembled perspective view of the center light emission part with which the lamp | ramp shown in FIG. 7 is provided. It is the perspective view which abbreviate | omitted illustration of the base end side support body and the front end side support body in the lamp | ramp shown in FIG. It is the perspective view which looked at the lamp | ramp of Embodiment 5 of this invention from the diagonal front end side. It is a disassembled perspective view of the center light emission part with which the lamp | ramp shown in FIG. 10 is provided. It is the perspective view which abbreviate | omitted illustration of the front end side support body in the lamp | ramp shown in FIG. It is the perspective view which looked at the lamp | ramp of Embodiment 6 of this invention from the diagonal front end side. It is a disassembled perspective view of the center light emission part with which the lamp | ramp shown in FIG. 13 is provided. It is the perspective view which looked at the lamp | ramp of Embodiment 7 of this invention from the diagonal front end side. It is a disassembled perspective view of the center light emission part with which the lamp | ramp shown in FIG. 15 is provided. It is the perspective view which looked at the lamp | ramp of Embodiment 8 of this invention from the diagonal front end side. It is the perspective view which looked at the lamp | ramp of Embodiment 9 of this invention from the diagonal front end side. It is the perspective view which looked at the lamp | ramp of Embodiment 10 of this invention from the diagonal front end side. It is the perspective view which looked at the lamp | ramp of Embodiment 11 of this invention from the diagonal front end side. It is the perspective view which looked at the lamp | ramp of Embodiment 12 of this invention from the diagonal front end side. It is a perspective view which shows the modification of the reflector of the center light emission part in Embodiment 4 of this invention. It is a side view which shows the other modification of the light guide of the center light emission part and light control means in Embodiment 5 or Embodiment 6 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is simplified or abbreviate | omitted.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a lamp according to Embodiment 1 of the present invention viewed from an oblique front end side. A lamp 1A according to the first embodiment shown in FIG. 1 includes a screw-type base 2, a base mounting part 3, a central light emitting part 4, a side light emitting unit 5, a base end side support body 6, and a front end side support. And a body 7. In the lamp 1A of the present embodiment, the outer dimensions of the lamp (length, outer diameter, effective light emitting area length from the lamp tip) can be made almost equal to a general 250 W class mercury lamp. In this case, the base 2 can be an E39 base (Φ39 mm). However, it goes without saying that the present invention is not limited to such specifications. In the following description, the base 2 side is referred to as a “base end side”, and the opposite side is referred to as a “tip end side”. An imaginary straight line corresponding to the central axis of the base 2 is referred to as a “lamp central axis”.

  The base 2 is mounted on the base mounting portion 3. The base mounting portion 3 is preferably composed of a resin material having excellent heat resistance, a resin material having excellent heat dissipation, a metal material, or a combination thereof. The base mounting portion 3 is connected to the base end side support 6 on the side opposite to the base 2. The base end side support 6 supports the base end portions of the central light emitting unit 4 and the side light emitting unit 5. The front end side support 7 supports the front end portions of the central light emitting unit 4 and the side light emitting unit 5. Power is supplied to the central light emitting unit 4 and the side light emitting unit 5 through a power supply line (not shown) disposed on the base mounting part 3 and the base end side support 6.

  The configuration of the central light emitting unit 4 will be described later. First, the configuration of the side light emitting unit 5 will be described. The side light emitting unit 5 includes an LED (Light Emitting Diode) light source 5a (light emitting element), a light source substrate 5b, a heat sink 5c, and a translucent cover 5d. The lamp 1 </ b> A of the present embodiment includes four side light emitting units 5. Each side light emitting unit 5 has the same configuration. These side light emitting units 5 are arranged around the central light emitting unit 4 with the light emitting surface facing outward. A space is provided between adjacent side light emitting units 5. These side light emitting units 5 are arranged at equal intervals in the circumferential direction of the lamp 1A. That is, these side light emitting units 5 are arranged at equiangular intervals (90 ° intervals in the present embodiment) around the lamp central axis. By arranging the side light emitting unit 5 in this way, it is possible to ensure light distribution to the entire periphery of the lamp 1A. In the present invention, the number of side light emitting units 5 is not limited to four, but may be at least three, and may be five, or six or more within a range that conforms to the lamp outer size specification.

  The LED light source 5a is mounted on the surface side of the light source substrate 5b. Power is supplied to the LED light source 5a through the light source substrate 5b. In the first embodiment, a plurality of 1 W to several W class surface mount type small LED packages are used as the LED light source 5a, but other types of LEDs may be used. Moreover, in this invention, you may use light emitting elements (for example, organic EL (Electro-Luminescence) light source) other than LED.

  The heat sink 5c is disposed on the back side of the light source substrate 5b. The heat sink 5c has a plate-like portion that overlaps the back side of the light source substrate 5b, and a plurality of pin fins that protrude from the plate-like portion toward the inside of the lamp 1A. The heat sink 5c radiates heat generated by the LED light source 5a to the air. The heat sink 5c is not limited to the illustrated configuration. For example, the heat sink 5c may have a plate-like fin instead of the pin fin.

  The translucent cover 5d has translucency and waterproof moisture resistance. The translucent cover 5d is formed so as to cover the entire light source substrate 5b. The translucent cover 5d is configured to cover all the LED light sources 5a of the side light emitting unit 5 in a lump. The constituent material of the translucent cover 5d is preferably a material excellent in moisture resistance, water resistance, light resistance, earthquake resistance, etc. For example, a polycarbonate material excellent in ease of molding and environmental resistance is preferably used. it can. Further, the joint between the translucent cover 5d and the heat sink 5c has a waterproof and moisture-proof structure. As such a configuration, for example, a mounting groove (not shown) in which the outer peripheral portion of the translucent cover 5d is fitted is formed in the heat sink 5c, and the periphery of the fitting portion is made of, for example, a silicone-based moisture-proof resin. The structure to coat is mentioned. In the lamp 1A of the present embodiment, the LED light source 5a and the light source substrate 5b can be reliably protected from the environment by providing the translucent cover 5d and ensuring the waterproof and moisture-proof property of the mounting portion. For this reason, since the lamp | ramp 1A whole exhibits the outstanding environmental resistance, it can be preferably used also for the lighting fixture installed outdoors.

  In the translucent cover 5d, a geometric uneven pattern may be provided, the shape may be different between the front end side and the base end side of the lamp 1A, or the cover transmittance may be adjusted. With these configurations, it is possible to intentionally adjust the light distribution by controlling the direction of light from each LED light source 5a on the inner or outer surface of the cover or changing the distance from each LED light source 5a to the cover. It becomes possible.

  The translucent cover 5d preferably has a shape that covers a side surface of the LED light source 5a while ensuring a sufficient distance from the surface of the LED light source 5a. Thereby, since the side surface light emitting unit 5 can irradiate light not only to the surface side of the LED light source 5a but also to the side surface side of the LED light source 5a, the effect of widening the light distribution of the lamp 1A can be obtained. . In particular, in a cover having diffusibility, a change in luminance (contrast) on the lamp 1A viewed from the outside of the lamp 1A can be suppressed to a low level.

  The overall shape of the side light emitting unit 5 is such that the length in the direction of the lamp central axis is longer than the length in the direction perpendicular thereto. Since the side light emitting unit 5 has a shape that is long in the direction of the lamp central axis, a sufficiently large number of LED light sources 5 a can be mounted on the side light emitting unit 5. For this reason, the lamp 1A is advantageous for increasing the luminous flux. The schematic shape of the side light emitting unit 5 of the present embodiment viewed from the direction perpendicular to the light source substrate 5b is a substantially rhomboid hexagon. The shape of the side light emitting unit 5 is not limited to the illustrated shape. For example, the schematic shape of the side light emitting unit 5 viewed from the direction perpendicular to the light source substrate 5b may be a rectangle, a polygon, an ellipse, or the like.

  Adjacent side light emitting units 5 are not in contact with each other. An interval through which air can pass is provided between the adjacent side light emitting units 5. Since air flows between the adjacent side surface light emitting units 5, it is possible to enhance the heat radiation effect due to air convection in the heat sink 5 c. As a result, excellent heat dissipation is obtained, and the LED light source 5a can be made low in temperature, so that the efficiency and long life of the LED light source 5a can be increased.

  The lamp 1A of the present embodiment promotes air convection and the like in the heat sink 5c of each side light emitting unit 5 regardless of the orientation in the installed state (the base 2 is upward, the base 2 is downward, the base 2 is sideways, etc.) And excellent heat dissipation is obtained.

  The width of the side light emitting unit 5 in the direction perpendicular to the longitudinal direction of the side light emitting unit 5 is maximum at the central portion of the side light emitting unit 5 in the longitudinal direction. It gradually decreases toward the edge. With this configuration, the following effects are further obtained in the present embodiment. The interval between the adjacent side light emitting units 5 is small at the central portion in the longitudinal direction of the side light emitting units 5 and increases from the central portion toward the distal end side and the proximal end side. That is, the interval is increased on each of the front end side and the base end side of the side light emitting unit 5. In this case, it is easy to form a circulation in which the air entering from one of the large intervals on the distal end side and the proximal end side of the side light emitting unit 5 flows along the heat sink 5c and exits from the other large interval. As a result, the heat dissipation effect by air convection or the like in the heat sink 5c can be enhanced, and more excellent heat dissipation can be obtained.

  In the present embodiment, each side light emitting unit 5 is arranged such that the light source substrate 5b is substantially parallel to the lamp central axis. The present invention is not limited to such a configuration, and the light source substrate 5b of the side light emitting unit 5 may be inclined with respect to the lamp central axis.

  The base end side support 6 has a shape in which an arm portion projects radially from the central portion toward the base end portion of each side light emitting unit 5, and the arm portion is fixed to the base end portion of the side light emitting unit 5. Is done. In the present embodiment, since the number of side light emitting units 5 is four, the base end side support 6 has a substantially cross shape having arms that project in four directions when viewed from the direction of the lamp central axis.

  The distal end support 7 has a shape in which an arm portion projects radially from the central portion toward the distal end portion of each side light emitting unit 5, and the arm portion is fixed to the distal end portion of the side light emitting unit 5. In the present embodiment, since the number of the side light emitting units 5 is four, the distal end support 7 has a substantially cross shape having arms that protrude in four directions when viewed from the direction of the lamp central axis.

  A space through which air can pass is formed between the base end side support body 6 and the front end side support body 7. Thereby, the airflow which hits the heat sink 5c can be accelerated | stimulated, and the outstanding heat dissipation is obtained. In the present embodiment, the side light emitting unit 5 is supported only at the two locations of the base end side support 6 and the tip end support 7. Thereby, the airflow which hits the heat sink 5c is not obstructed, and the heat radiation from the heat sink 5c can be surely promoted.

  The constituent material of the base end side support body 6 and the front end side support body 7 is preferably a material excellent in heat dissipation or a material having high thermal conductivity. The constituent material of the base end side support body 6 and the front end side support body 7 is particularly preferably a metal material. The surfaces of the base end side support body 6 and the front end side support body 7 (at least the surface of the exposed portion) may be high reflectivity surfaces having diffusibility. Thereby, suppression of light reflection loss and wide light distribution can be achieved. Moreover, you may perform the high radiation process which raises an emissivity (radiation rate) to the surface (at least the surface of the exposed part) of the base end side support body 6 and the front end side support body 7. FIG. Examples of the high radiation treatment include application of a heat radiation paint, alumite treatment on aluminum, and the like. By performing high radiation treatment, heat dissipation can be further increased.

  In the present embodiment, one side light emitting unit 5 is supported at two locations, that is, the base end side support 6 and the distal end side support 7, but in the present invention, one side light emitting unit 5 is provided at one location. It is good also as a structure supported by.

  FIG. 2 is a perspective view of the lamp 1A shown in FIG. As indicated by the arrows in FIG. 2, the light emitted from the central light emitting unit 4 is emitted through the adjacent side light emitting units 5. An interval through which air can pass is provided between the central light emitting unit 4 and the side light emitting unit 5. Since air flows between the central light emitting unit 4 and the side light emitting unit 5, the heat radiation effect of both the central light emitting unit 4 and the side light emitting unit 5 can be enhanced. According to the lamp 1A of the present embodiment, since the central light emitting unit 4 is provided, the following effects can be obtained.

  Light emitted from the central light emitting unit 4 is emitted from between the adjacent side light emitting units 5. Thereby, it can suppress reliably that the brightness | luminance of lamp | ramp 1A falls between adjacent side surface light emission units 5. FIG. When the lamp 1A is attached to a lighting device (street light device, road light device, high ceiling device, etc.) and observed from the outside, the side light emitting units 5 are adjacent to each other compared with the luminance at a position. It is possible to reliably suppress a decrease in luminance at the position in between. That is, it is possible to reliably suppress the occurrence of luminance unevenness. In particular, even when the lamp 1A is mounted on a lighting fixture having a milky white translucent cover, it is possible to reliably avoid the problem that the position between adjacent side light emitting units 5 appears dark on the cover. . In addition, as an impression when the lamp 1A is turned on, negative humidity and discomfort caused by uneven brightness can be reliably suppressed, and continuity of ambient illuminance (brightness) can be maintained. In order to improve the heat dissipation of the side light emitting units 5, it is necessary to provide an interval in which air can sufficiently flow between the side light emitting units 5. According to the lamp 1A, even when the interval between the adjacent side surface light emitting units 5 is sufficiently wide, by providing the central light emitting unit 4, it is possible to reliably suppress the luminance unevenness. According to the lamp 1 </ b> A, the gap between the adjacent side light emitting units 5 can be sufficiently widened while reliably suppressing the luminance unevenness, so that the heat dissipation of the side light emitting units 5 can be improved. As a result, the LED light source 5a of the side light emitting unit 5 can be made low temperature, and the efficiency and long life of the LED light source 5a can be improved. According to the lamp 1A, the above-described effects can be reliably achieved regardless of conditions such as the size of the luminous flux, the number of side light emitting units 5 mounted, the configuration of the lighting fixture to be mounted, and the like.

  The central light emitting unit 4 of the lamp 1 </ b> A of the present embodiment has a plurality of central light emitting units 8. The lamp 1 </ b> A of the present embodiment has the same number (four in the illustrated configuration) of central light emitting units 8 as the side light emitting units 5. Each central light emitting unit 8 is disposed with its light emitting surface facing between the adjacent side light emitting units 5. Each of the central light emitting units 8 has the same configuration. A space is provided between adjacent central light emitting units 8. The central light emitting units 8 are arranged at equal intervals in the circumferential direction of the lamp 1A. That is, the central light emitting units 8 are arranged at equiangular intervals (90 ° intervals in the illustrated configuration) around the lamp central axis.

  FIG. 3 is a perspective view of the lamp 1A shown in FIG. As shown in FIG. 3, the central light emitting unit 8 includes an LED light source 8a (light emitting element), a light source substrate 8b, a heat sink 8c, and a translucent cover 8d. FIG. 3 shows a state in which the translucent cover 8 d is removed from each central light emitting unit 8. In FIG. 3, as for the translucent cover 8d, only the translucent cover 8d of one central light emitting unit 8 is shown, and the translucent covers 8d of the other central light emitting units 8 are omitted.

  The LED light source 8a is mounted on the surface side of the light source substrate 8b. Power is supplied to the LED light source 8a through the light source substrate 8b. In the first embodiment, a plurality of 1 W to several W class surface-mount type small LED packages are used as the LED light source 8a, but other types of LEDs may be used. Moreover, in this invention, you may use light emitting elements (for example, organic EL light source) other than LED.

  The heat sink 8c is disposed on the back side of the light source substrate 8b. The heat sink 8c has a plate-like portion that overlaps the back side of the light source substrate 8b, and a plurality of plate-like fins that protrude from the plate-like portion toward the inside of the lamp 1A. The heat sink 8c radiates heat generated by the LED light source 8a to the air. The heat sink 8c is not limited to the illustrated configuration, and may be configured to have pin fins, for example.

  The translucent cover 8d has translucency and waterproof moisture resistance. The translucent cover 8d is formed so as to cover the entire light source substrate 8b. The translucent cover 8d is configured to collectively cover all the LED light sources 8a of the central light emitting unit 8. A preferable constituent material of the translucent cover 8d is the same as that of the translucent cover 5d. The mounting portion of the translucent cover 8d is configured to have waterproof and moistureproof properties in the same manner as the translucent cover 5d. In the lamp 1A of the present embodiment, the light source 8a and the light source substrate 8b can be reliably protected from the environment by providing the translucent cover 8d and ensuring the waterproof and moistureproof property of the mounting portion. For this reason, since the lamp | ramp 1A whole exhibits the outstanding environmental resistance, it can be preferably used also for the lighting fixture installed outdoors.

  The overall shape of the central light emitting unit 8 is such that the length in the direction of the lamp central axis is longer than the length in the direction perpendicular thereto. The length of the central light emitting unit 8 in the longitudinal direction is substantially equal to the length of the side light emitting unit 5 in the longitudinal direction. Since the central light emitting unit 8 has a shape that is long in the direction of the lamp central axis, a sufficient number of LED light sources 8 a can be mounted on the central light emitting unit 8. For this reason, the lamp 1A is advantageous for increasing the luminous flux. The schematic shape of the central light emitting unit 8 of the present embodiment viewed from the direction perpendicular to the light source substrate 8b is a rectangle, but may be a polygon, an ellipse, or the like.

  Adjacent central light emitting units 8 are not in contact with each other. An interval through which air can pass is provided between adjacent central light emitting units 8. By allowing air to flow between the adjacent central light emitting units 8, it is possible to enhance the heat dissipation effect due to air convection in the heat sink 8c. As a result, excellent heat dissipation is obtained, and the LED light source 8a can be made low in temperature, so that the LED light source 8a can be highly efficient and have a long life.

  The lamp 1A of the present embodiment promotes air convection and the like in the heat sink 8c of each central light emitting unit 8 regardless of the orientation in the installed state (the base 2 is upward, the base 2 is downward, the base 2 is sideways, etc.) And excellent heat dissipation is obtained.

  In the present embodiment, each central light emitting unit 8 is arranged such that the light source substrate 8b is substantially parallel to the lamp central axis. The present invention is not limited to such a configuration, and the light source substrate 8b of the central light emitting unit 8 may be inclined with respect to the lamp central axis. Further, the shape and structure of the central light emitting unit 8 are not limited to the illustrated configuration. For example, the following may be used. As described above, in the present embodiment, the interval between the side light emitting units 5 adjacent to each other is small at the central portion in the longitudinal direction of the side light emitting units 5 and increases from the central portion toward the distal end side and the proximal end side. . Corresponding to such a configuration, the light emitting part of the central light emitting unit 8 is arranged in a portion where the distance between adjacent side light emitting units 5 is large (the portion on the distal end side and the proximal end side excluding the central portion in the longitudinal direction). It may be arranged in a concentrated manner.

  The translucent cover 8d of the central light emitting unit 8 may be provided with a geometric uneven pattern, may have a different shape on the front end side and the base end side of the lamp 1A, or may adjust the cover transmittance. With these configurations, it is possible to intentionally adjust the light distribution by controlling the direction of light from each LED light source 8a on the inner or outer surface of the cover, or by changing the distance from each LED light source 8a to the cover. It becomes possible.

  The translucent cover 8d of the central light emitting unit 8 of the present embodiment has a linear Fresnel lens portion on the surface. The light emitted from the LED light source 8a passes through the linear Fresnel lens portion of the translucent cover 8d and is emitted from the central light emitting unit 8. The beam angle of light emitted from the central light emitting unit 8 is narrower than the beam angle of light directly emitted from the LED light source 8a. The linear Fresnel lens unit is an example of a narrow light distribution unit having a function of narrowing the beam angle. The narrow light distribution unit is not limited to the linear Fresnel lens unit, and may be a convex lens unit, a Fresnel lens unit, a cylindrical lens unit, or the like.

  FIG. 4 is a view of the lamp 1A shown in FIG. 1 as viewed from the front end side with the illustration of the front end support 7 and the side light emitting unit 5 omitted. FIG. 4 shows the light distribution characteristics of the central light-emitting unit 8 when viewed from a direction parallel to the lamp central axis. The optical axis of the central light emitting unit 8 passes between the adjacent side light emitting units 5. Note that the optical axis refers to a virtual light beam serving as a light flux of outgoing light or a central axis of the light beam. In the present embodiment, the central light emitting unit 8 is provided with a narrow light distribution portion that narrows the beam angle, so that the light emitted from the central light emitting unit 8 can be efficiently transmitted between the adjacent side light emitting units 5. Can pass through. For this reason, it can suppress more reliably that the brightness irregularity arises in the lamp 1A.

  In the present embodiment, the light distribution characteristics of the central light emitting unit 4 are not uniform in the circumferential direction of the lamp 1A. The light distribution characteristic of the central light emitting unit 4 is high in the direction toward the adjacent side light emitting units 5 and low in the direction toward the back surface of the side light emitting units 5. Thereby, it can suppress that the light radiate | emitted from the center light emission part 4 is blocked | interrupted by the side light emission unit 5, and it can suppress, and the utilization efficiency of the light radiate | emitted from the center light emission part 4 can be made high. In addition, the luminous intensity of light traveling from the central light emitting unit 4 to the middle between the adjacent side light emitting units 5 is higher than the luminous intensity of light traveling from the central light emitting unit 4 to the center of the back surface of the lateral light emitting unit 5. By configuring, an effect similar to the above can be obtained.

  The light source substrates 5b and 8b may be organic material substrates or ceramic substrates, but are preferably composed of metal substrates such as aluminum or iron. By configuring the light source substrates 5b and 8b with a metal substrate, it is possible to improve heat dissipation and improve durability to vibration. The surfaces of the light source substrates 5b and 8b are preferably subjected to surface resist treatment with a white paint or the like in order to suppress light loss. Further, even when the heat loss in the lamp 1A is suppressed as much as possible by applying a white high reflection paint to the heat sinks 5c, 8c, the base end side support body 6, the front end side support body 7 and the like. good. The constituent material of the heat sinks 5c and 8c is preferably a metal material. The surface of the heat sinks 5c and 8c may be further thermally radiated to further increase heat dissipation.

  The shapes of the side light emitting unit 5 and the central light emitting unit 8 are not limited to the illustrated shapes. Further, the arrangement of the LED light sources 5a and 8a, the size of the light source substrates 5b and 8b, and the like can be adjusted according to the required light distribution shape or light flux. Further, the light source substrates 5b and 8b do not necessarily have to have a planar shape. For example, in order to obtain a desired light distribution characteristic, a flexible substrate or the like is used so that the mounting portions of the individual LED light sources 5a and 8a are continuous. Alternatively, a step may be formed. However, since the flexible substrate is expensive, from the viewpoint of reducing the cost, a planar substrate is used as in this embodiment, and the optical axes of the individual LED light sources 5a and 8a are perpendicular to the substrate. It is preferable to mount and enable easy manufacture.

  The fixing method of the joint part of the base end side support body 6 and the front end side support body 7, and the center light emission part 4 and the side light emission unit 5 is any methods, such as insertion, a slide, screwing, welding, brazing, adhesion | attachment, for example. good. Or you may fix by those combined methods. The heat dissipation can be further improved by configuring the joint so that the heat conduction from the heat sinks 5c and 8c to the base end support 6 and the tip support 7 is good.

  Further, in the present embodiment, a surface mount type small LED package is used as the light emitting element (LED light sources 5a, 8a), but the light emitting element in the present invention is not limited to this, for example, several thousand. A COB (Chip on Board) type LED light source having a large luminous flux of tens of thousands of lm / piece may be used. The COB type LED light source has a configuration in which a plurality of LED bare chips are directly mounted on a heat radiating substrate such as a metal substrate or a ceramic substrate and resin-sealed. Moreover, in this invention, you may use not only an LED light source but an organic EL light source etc. as a light emitting element, for example.

  In the present embodiment, the base end side support body 6 and the distal end side support body 7 are connected and fixed to each other only through the central light emitting unit 4 (central light emitting unit 8) and the side light emitting unit 5. For this reason, circulation of air in the space between the base end side support body 6 and the front end side support body 7 can be promoted, and heat dissipation can be further improved.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG. 5. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 5 is a perspective view of the lamp according to the second embodiment of the present invention as viewed from the oblique tip side. The lamp 1B of the second embodiment shown in FIG. 5 is the same as the lamp 1A of the first embodiment except that the configuration of the central light emitting unit 4 is different. In FIG. 5, the illustration of the support 7 on the front end side of the lamp 1B is omitted.

  The central light emitting section 4 of the lamp 1B of the present embodiment includes the same number (four in the illustrated configuration) of central light emitting units 8 as the side light emitting units 5, and a heat sink 4c shared by these central light emitting units 8. The central light emitting unit 8 of the lamp 1B according to the present embodiment includes an LED light source 8a, a light source substrate 8b, and a translucent cover 8d. The central light emitting unit 8 of the lamp 1B according to the present embodiment shares the heat sink 4c with other central light emitting units in place of the individual heat sinks 8c of the first embodiment. The heat sink 4c has a cylindrical shape with an octagonal cross section. The central axis of the cylindrical heat sink 4c coincides with the lamp central axis. The back surface of the light source substrate 8b contacts the outer surface of the heat sink 4c. Air can pass through the hollow portion of the heat sink 4c. The heat dissipation effect can be enhanced by the air flowing into the hollow portion of the heat sink 4c. As a result, excellent heat dissipation is obtained, and the LED light source 8a can be made low in temperature, so that the LED light source 8a can be highly efficient and have a long life. Fins may be formed on the inner surface of the heat sink 4c. Moreover, you may form a fin in the range which is not covered with the center light emission unit 8 on the outer surface of the heat sink 4c. By forming these fins on the heat sink 4c, the heat dissipation effect can be further enhanced.

  A joint portion between the translucent cover 8d and the heat sink 4c is configured to be waterproof and moistureproof. The constituent material of the heat sink 4c is preferably a metal material. The surface of the heat sink 4c may be heat radiation coated to further increase the heat dissipation. According to the lamp 1B of the present embodiment, the same effects as those of the first embodiment can be obtained. In addition, since the plurality of central light emitting units 8 can be fixed to the common heat sink 4c, assembly is simplified.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described with reference to FIG. 6. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 6 is a perspective view of the lamp according to the third embodiment of the present invention viewed from the oblique tip side. The lamp 1C of the third embodiment shown in FIG. 6 is the same as the lamp 1A of the first embodiment except that the configuration of the translucent cover 8d of the central light emitting unit 8 is different. In FIG. 6, illustration of the base end side support body 6 and the front end side support body 7 is abbreviate | omitted.

  In the translucent cover 8d of the central light emitting unit 8 provided in the lamp 1C of the present embodiment, a convex lens portion as a narrow light distribution portion is formed instead of the linear Fresnel lens portion in the first embodiment. According to the lamp 1C of the present embodiment, the same effect as in the first embodiment can be obtained.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described with reference to FIG. 7 to FIG. 9. The difference from the above-described embodiment will be mainly described, and the same parts or corresponding parts will be denoted by the same reference numerals. The description will be simplified or omitted. FIG. 7 is a perspective view of the lamp according to the fourth embodiment of the present invention as viewed from the oblique tip side. The lamp 1D of the fourth embodiment shown in FIG. 7 is the same as the lamp 1A of the first embodiment except that the configuration of the central light emitting unit 4 is different.

  FIG. 8 is an exploded perspective view of the central light emitting unit 4 provided in the lamp 1D shown in FIG. As shown in FIG. 8, the central light emitting unit 4 of the lamp 1D of the present embodiment includes an LED light source 4a (light emitting element), a light source substrate 4b, a translucent cover 4d, and a reflector 4e. The light source substrate 4b is disposed perpendicular to the lamp central axis. The center of the light source substrate 4b is disposed on the lamp central axis. The light source substrate 4 b is installed on the base end side support 6. In the illustrated configuration, the shape of the light source substrate 4b is circular, but may be a polygon or the like.

  The LED light source 4a is mounted on the surface side of the light source substrate 4b. Power is supplied to the LED light source 4a through the light source substrate 4b. In the present embodiment, a plurality of 1 W to several W class surface-mount type small LED packages are used as the LED light source 4a, but other types of LEDs may be used. Moreover, in this invention, you may use light emitting elements (for example, organic EL light source) other than LED. The heat generated by the LED light source 4a is conducted to the base end support 6 through the light source substrate 4b. Thereby, LED light source 4a can be made into low temperature, and efficiency improvement and lifetime improvement of LED light source 4a can be achieved. In the present embodiment, the same number of LED light sources 4a as the number of side light emitting units 5 (four in the present embodiment) are arranged at equiangular intervals around the lamp central axis.

  The translucent cover 4d has translucency and waterproof moisture resistance. The translucent cover 4d is formed to cover the entire light source substrate 4b. In the illustrated configuration, the schematic shape of the translucent cover 4d viewed from a direction parallel to the lamp central axis is a circle, but may be a polygon or the like. A preferable constituent material of the translucent cover 4d is the same as that described in the first embodiment. The attachment portion of the translucent cover 4d is configured to have waterproof and moistureproof properties in the same manner as described in the first embodiment. In the lamp 1D of the present embodiment, the LED light source 4a and the light source substrate 4b can be reliably protected from the environment by providing the translucent cover 4d and ensuring the waterproof and moisture-proof property of the mounting portion.

  The translucent cover 4d has a convex lens portion as a narrow light distribution portion on the surface at a position facing each LED light source 4a. The light emitted from the LED light source 4a is emitted through the convex lens portion of the translucent cover 4d. Compared with the beam angle of light directly emitted from the LED light source 4a, the beam angle of light emitted from the convex lens portion of the translucent cover 4d becomes narrower.

  The reflector 4e is arranged so that its longitudinal direction is parallel to the lamp center axis. The LED light source 4a is disposed on one end side (base end side) of the reflector 4e. In the reflector 4e of the present embodiment, the cross section perpendicular to the longitudinal direction has a cross shape. The reflector 4e has a function of reflecting the light emitted from the LED light source 4a through the translucent cover 4d toward the side surface light emitting units 5 adjacent to each other. The reflecting surface of the reflector 4e desirably has a high reflectance. The reflecting surface of the reflector 4e is a mirror surface or a diffusing surface. By changing the characteristics of the reflecting surface of the reflector 4e, the design and light distribution characteristics when the lamp 1D is turned on can be adjusted.

  FIG. 9 is a perspective view of the lamp 1D shown in FIG. 7 in which the proximal end support 6 and the distal end support 7 are not shown. As shown in FIG. 9, the reflecting surface of the reflector 4 e forms a concave portion facing each other between the adjacent side light emitting units 5. The concave portion is hereinafter referred to as a “reflective concave portion”. The number of reflection recesses is the same as the number of side light emitting units 5 (four in the present embodiment). The reflective recess has a groove shape extending along a direction parallel to the lamp central axis. The LED light source 4a of the central light emitting part 4 and the convex lens part of the translucent cover 4d are located on the base end side of the reflective concave part. As indicated by the arrows in FIG. 9, the light emitted from the LED light source 4a through the convex lens portion of the translucent cover 4d is reflected by the reflective concave portion of the reflector 4e, so that the adjacent side surface light emitting units 5 are connected to each other. Radiated through. Thereby, the same effect as Embodiment 1 is acquired. The optical axis of the light emitted from the LED light source 4a via the translucent cover 4d may be parallel to the lamp center axis, but may be inclined inward (toward the reflector 4e).

  In the present embodiment, the light distribution characteristics of the central light emitting unit 4 are not uniform with respect to the circumferential direction of the lamp 1D. The light distribution characteristic of the central light emitting unit 4 is high in the direction toward the adjacent side light emitting units 5 and low in the direction toward the back surface of the side light emitting units 5. Thereby, it can suppress that the light radiate | emitted from the center light emission part 4 is blocked | interrupted by the side light emission unit 5, and can be lost, and can improve the utilization efficiency of the light radiate | emitted from the center light emission part 4.

  In this Embodiment, the cross-sectional shape of the reflective recessed part perpendicular | vertical with respect to the longitudinal direction of the reflector 4e exhibits L shape. That is, the reflective recess has two flat reflective surfaces perpendicular to each other. The apex portion where the two reflecting surfaces are joined may be corners, but may be curved and curved. By making the apex portion a curved surface, reflection loss can be reduced. Moreover, you may make the whole reflective recessed part into a curved surface.

  The reflector 4e may be made of a metal material, and the light source substrate 4b and the base end of the reflector 4e may be joined so that heat can be transferred from the light source substrate 4b to the reflector 4e. Thereby, the LED light source 4a can be further lowered in temperature, and the LED light source 4a can be further improved in efficiency and life. In this case, the translucent cover 4d may be divided so as to cover each LED light source 4a. The heat dissipation can be further improved by joining the tip of the reflector 4e and the tip support 7 so as to allow heat conduction.

  In the present embodiment, a plurality of reflection recesses are formed by one reflector 4e, but each reflection recess may be formed by separate reflectors.

Embodiment 5. FIG.
Next, a fifth embodiment of the present invention will be described with reference to FIG. 10 to FIG. 12. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be denoted by the same reference numerals. The description will be simplified or omitted. FIG. 10 is a perspective view of the lamp according to the fifth embodiment of the present invention viewed from the oblique front end side. The lamp 1E of the fifth embodiment shown in FIG. 10 is the same as the lamp 1A of the first embodiment except that the configuration of the central light emitting unit 4 is different.

  FIG. 11 is an exploded perspective view of the central light emitting unit 4 provided in the lamp 1E shown in FIG. As shown in FIG. 11, the central light emitting unit 4 of the lamp 1E of the present embodiment includes an LED light source 4a (light emitting element), a light source substrate 4b, a case 4f, a light guide 4g, and a diffuse reflection unit 4h. Is provided. The LED light source 4a and the light source substrate 4b are the same as those in the fourth embodiment. The light source substrate 4b is installed at the bottom of the case 4f. The case 4f has an outer wall portion surrounding the light source substrate 4b. It is desirable that the inner peripheral surface of the outer wall portion of the case 4f has a high reflectance. By reflecting light on the inner peripheral surface of the outer wall portion of the case 4f, the light emitted from the LED light source 4a to the side can be incident on the light guide 4g with higher efficiency.

  The light guide 4g is made of a transparent material. The light guide 4g has a solid cylindrical shape as an overall shape. The overall shape of the light guide 4g is not limited to the cylindrical shape as shown in the figure, and may be a prismatic shape or the like. The light guide 4g is arranged so that its longitudinal direction is parallel to the lamp central axis. The light guide 4g is arranged so that its central axis coincides with the lamp central axis. The base end portion of the light guide 4g is inserted inside the outer wall portion of the case 4f. The base end portion of the light guide 4g is fixed to the case 4f. The end surface of one end (base end) of the light guide 4g faces the LED light source 4a. The LED light source 4a and the light source substrate 4b can be reliably protected from the environment by configuring the joint between the light guide 4g and the case 4f to have a waterproof and moisture-proof property.

  The diffuse reflection part 4h is provided inside the light guide 4g. The diffuse reflection unit 4h is an example of a light control unit that emits light from the side surface of the light guide 4g. The diffuse reflection portion 4h of the present embodiment is configured with a member similar to the reflector 4e of the fourth embodiment. The diffuse reflection portion 4h has a cross-shaped cross section perpendicular to the longitudinal direction of the light guide 4g. The diffuse reflection part 4h has a function of diffusing and reflecting the light inside the light guide 4g. The diffuse reflection part 4h desirably has a high reflectance. The diffuse reflection part 4h forms a concave surface inside the light guide 4g, and the concave surface faces between the adjacent side light emitting units 5. The concave surface is hereinafter referred to as “reflection concave surface”. The number of reflective concave surfaces is the same as the number of side light emitting units 5 (four in this embodiment).

  FIG. 12 is a perspective view of the lamp 1E shown in FIG. As shown by the arrows in FIG. 12, the light emitted from the side surface of the light guide 4 g of the central light emitting unit 4 is radiated through between the adjacent side light emitting units 5. Thereby, the same effect as Embodiment 1 is acquired. The light incident on the base end of the light guide 4g from the LED light source 4a is guided by the diffuse reflection part 4h while being guided in the front end direction inside the light guide 4g, and thus from the side surface of the light guide 4g. It is emitted and radiated through between adjacent side light emitting units 5. Further, there is also light that travels inside the light guide 4g by repeating reflection at the diffuse reflection portion 4h and the side surface of the light guide 4g. The light is finally reflected by the diffuse reflection part 4h and then emitted from the side surface of the light guide 4g, and is emitted through the adjacent side light emitting units 5. According to the present embodiment, by providing the light guide 4g, the luminance of the central light emitting unit 4 can be equalized along the lamp central axis direction.

  In the present embodiment, the light distribution characteristics of the central light emitting unit 4 are not uniform in the circumferential direction of the lamp 1E. The light distribution characteristic of the central light emitting unit 4 is high in the direction toward the adjacent side light emitting units 5 and low in the direction toward the back surface of the side light emitting units 5. Thereby, it can suppress that the light radiate | emitted from the center light emission part 4 is blocked | interrupted by the side light emission unit 5, and it can suppress, and the utilization efficiency of the light radiate | emitted from the center light emission part 4 can be made high.

Embodiment 6 FIG.
Next, Embodiment 6 of the present invention will be described with reference to FIG. 13 and FIG. 14. The difference from the above-described embodiment will be mainly described, and the same parts or corresponding parts will be denoted by the same reference numerals. The description will be simplified or omitted. FIG. 13 is a perspective view of the lamp according to the sixth embodiment of the present invention viewed from the oblique front end side. The lamp 1F of the sixth embodiment shown in FIG. 13 is the same as the lamp 1A of the first embodiment except that the configuration of the central light emitting unit 4 is different. In FIG. 13, the illustration of the support 7 on the front end side of the lamp 1F is omitted.

  FIG. 14 is an exploded perspective view of the central light emitting unit 4 provided in the lamp 1F shown in FIG. As shown in FIG. 14, the central light emitting unit 4 of the lamp 1F according to the present embodiment includes a diffuse reflection unit 4i in place of the diffuse reflection unit 4h, as compared with the central light emitting unit 4 of the lamp 1E according to the fifth embodiment. Other than that, the same applies. The diffuse reflection unit 4i is an example of a light control unit that emits light from the side surface of the light guide 4g.

  The diffuse reflection part 4i is provided on the side surface of the light guide 4g. The diffuse reflection part 4i of the present embodiment has a function of diffusing and reflecting light inside the light guide 4g. The diffuse reflection part 4i desirably has a high reflectance. The diffuse reflection portion 4 i is disposed at a position facing the back surface of the side light emitting unit 5. The diffuse reflection part 4i does not exist on the side surface of the light guide 4g at the portion facing between the adjacent side light emitting units 5. The diffuse reflection portion 4i has a strip shape along the longitudinal direction of the light guide 4g. The diffuse reflection part 4i is opaque or translucent. The diffuse reflection portion 4i can be formed by, for example, a method such as application of a white diffusible paint, printing such as a silk screen, and adhesion of an adhesive sheet.

  As indicated by the arrows in FIG. 13, the light emitted from between the diffuse reflection portions 4 i on the side surface of the light guide 4 g of the central light emitting unit 4 passes between the adjacent side light emitting units 5 and radiates. Is done. Thereby, the same effect as Embodiment 1 is acquired. The light incident on the base end of the light guide 4g from the LED light source 4a is guided by the diffuse reflection part 4i while being guided in the distal direction inside the light guide 4g, thereby being reflected from the side surface of the light guide 4g. It is emitted and radiated through between adjacent side light emitting units 5. Further, there is also light that travels inside the light guide 4g by repeating reflection at the diffuse reflection portion 4i and the side surface of the light guide 4g. The light is finally reflected by the diffuse reflection part 4i to be emitted from the side surface of the light guide 4g, and is emitted between the adjacent side light emitting units 5. According to the present embodiment, by providing the light guide 4g, the luminance of the central light emitting unit 4 can be equalized along the lamp central axis direction.

  In the present embodiment, the light distribution characteristics of the central light emitting unit 4 are not uniform in the circumferential direction of the lamp 1F. The light distribution characteristic of the central light emitting unit 4 is high in the direction toward the adjacent side light emitting units 5 and low in the direction toward the back surface of the side light emitting units 5. Thereby, it can suppress that the light radiate | emitted from the center light emission part 4 is blocked | interrupted by the side light emission unit 5, and can be lost, and can improve the utilization efficiency of the light radiate | emitted from the center light emission part 4.

Embodiment 7 FIG.
Next, Embodiment 7 of the present invention will be described with reference to FIG. 15 and FIG. 16. The description will focus on differences from the above-described embodiment, and the same or corresponding parts will be denoted by the same reference numerals. The description will be simplified or omitted. FIG. 15 is a perspective view of the lamp according to the seventh embodiment of the present invention viewed from the oblique front end side. The lamp 1G of the seventh embodiment shown in FIG. 15 is the same as the lamp 1A of the first embodiment except that the configuration of the central light emitting unit 4 is different. In FIG. 15, the illustration of the distal end side support 7 of the lamp 1G is omitted.

  FIG. 16 is an exploded perspective view of the central light emitting unit 4 provided in the lamp 1G shown in FIG. As shown in FIG. 16, the central light emitting unit 4 of the lamp 1G of the present embodiment is guided in place of the light guide 4g and the diffuse reflection unit 4h, compared to the central light emitting unit 4 of the lamp 1E of the fifth embodiment. The same is true except that the light body 4j is provided.

  The light guide 4j is made of a transparent material. The light guide 4j has a hollow cylindrical shape as an overall shape. The overall shape of the light guide 4j is not limited to a cylindrical shape as shown in the figure, and may be a rectangular tube shape or the like. The light guide 4j is arranged so that its longitudinal direction is parallel to the lamp central axis. The light guide 4j is arranged so that its central axis coincides with the lamp central axis. The base end portion of the light guide 4j is inserted inside the outer wall portion of the case 4f. The base end portion of the light guide 4j is fixed to the case 4f. The LED light source 4a and the light source substrate 4b can be reliably protected from the environment by configuring the joint between the light guide 4j and the case 4f to have a waterproof and moisture-proof structure.

  A light diffusion surface is formed on one or both of the inner and outer surfaces of the light guide 4j. For example, the light diffusing surface is subjected to stripe processing of fine ridges extending along the longitudinal direction of the light guide 4j, or by installing a prism sheet extending along the longitudinal direction of the light guide 4j. Can be formed. The light incident on the hollow portion of the light guide 4j from the LED light source 4a is diffused on the light diffusion surface, and is emitted from the side surface of the light guide 4j to the outside of the light guide 4j. The light diffusion surface is an example of a light control unit that emits light from the side surface of the light guide 4j.

  By making the properties of the light diffusion surface of the light guide 4j different between the position facing the back surface of the side light emitting unit 5 and the position facing between the side light emitting units 5 adjacent to each other, the side light emitting units 5 adjacent to each other. The light distribution characteristics of the central light emitting unit 4 can be adjusted so that the luminous intensity is high in the direction toward each other and the luminous intensity is low in the direction toward the back surface of the side light emitting unit 5. For example, the fine unevenness of the light diffusion surface of the light guide 4j is relatively small at a position facing the back surface of the side light emitting unit 5, and relatively large at a position facing between the adjacent side light emitting units 5. Thus, it can be adjusted as described above. Moreover, you may provide the diffuse reflection part 4i demonstrated in Embodiment 6 in the side surface of the light guide 4j of this Embodiment.

  As indicated by the arrows in FIG. 15, the light incident on the hollow portion of the light guide 4 j from the LED light source 4 a of the central light emitting unit 4 is emitted from the side surface of the light guide 4 j and between the adjacent side light emitting units 5. Radiated through. Thereby, the same effect as Embodiment 1 is acquired. Further, there is also light that travels toward the tip of the light guide 4j by repeating reflection on the inner surface of the light guide 4j. The light is finally emitted from the side surface of the light guide 4j, and is emitted between the adjacent side light emitting units 5. According to the present embodiment, since the light guide 4j is provided, the luminance of the central light emitting unit 4 can be equalized along the lamp central axis direction.

Embodiment 8 FIG.
Next, an eighth embodiment of the present invention will be described with reference to FIG. 17. The difference from the above-described embodiment will be mainly described, and the same or corresponding parts will be denoted by the same reference numerals and the description will be given. Simplify or omit. FIG. 17 is a perspective view of the lamp according to the eighth embodiment of the present invention viewed from the oblique front end side. The lamp 1H of the eighth embodiment shown in FIG. 17 is the same as the lamp 1A of the first embodiment except that the tip light emitting unit 9 is further provided.

  The tip light emitting section 9 provided in the lamp 1H of the present embodiment is installed on the tip side support 7. The tip light emitting section 9 is arranged with the light emitting surface facing the lamp tip side. The tip light emitting unit 9 includes an LED light source 9a (light emitting element), a light source substrate 9b, and a translucent cover 9d. The LED light source 9a is mounted on the surface side of the light source substrate 9b. Power is supplied to the LED light source 9a through the light source substrate 9b. In the present embodiment, a plurality of 1 W to several W class surface mount type small LED packages are used as the LED light source 9a, but other types of LEDs may be used. Moreover, in this invention, you may use light emitting elements (for example, organic EL light source) other than LED.

  The translucent cover 9d has translucency and waterproof moisture resistance. The translucent cover 9d is formed so as to cover the entire light source substrate 9b. The translucent cover 9d is configured to collectively cover all the LED light sources 9a of the tip light emitting unit 9. A preferable constituent material of the translucent cover 9d is the same as that of the translucent cover 5d. The mounting portion of the translucent cover 9d is configured to have waterproof and moistureproof properties in the same manner as the translucent cover 5d.

  The heat generated by the LED light source 9a is conducted to the front end side support 7 through the light source substrate 9b. Thereby, the LED light source 9a can be made low temperature, and high efficiency and long life of the LED light source 9a can be achieved. The tip light emitting unit 9 may further include a heat sink (not shown). Moreover, you may provide in the front end side support body 7 the fin which dissipates the heat | fever transmitted from LED light source 9a to air. In the illustrated configuration, the schematic shape of the tip light emitting portion 9 when viewed from the lamp tip side is a circle, but may be another shape such as a regular polygon.

  The power supply path to the tip light emitting unit 9 preferably passes through at least one side light emitting unit 5. By connecting at least one side light emitting unit 5 and the tip light emitting unit 9 via a power supply line (not shown), power can be supplied to the tip light emitting unit 9 via the side light emitting unit 5. Although not shown, a conductive pattern for supplying power to the LED light source 5a of the light source substrate 5b and a conductive pattern for supplying power to the tip light emitting unit 9 are separately provided on the light source substrate 5b of at least one side light emitting unit 5. The latter conductive pattern may be electrically connected to the light source substrate 9b by the feeder line. By doing in this way, since the electric power feeding path | route which supplies electric power to the side light emission unit 5 and the electric power feeding path | route which supplies electric power to the front-end | tip light-emitting part 9 can be made electrically independent, the LED light source 5a of the side surface light-emitting unit 5 and the front-end | tip light-emitting part. Nine LED light sources 5a can individually control driving conditions such as current and voltage and lighting states.

  According to the present embodiment, in addition to the same effects as in the first embodiment, the following effects can be obtained. By providing the tip light emitting part 9, not only the lamp outer peripheral direction but also the lamp tip direction can be sufficiently illuminated. That is, omnidirectional light distribution is possible.

Embodiment 9 FIG.
Next, a ninth embodiment of the present invention will be described with reference to FIG. 18. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 18 is a perspective view of the lamp according to the ninth embodiment of the present invention viewed from the oblique front end side. The lamp 1J of the ninth embodiment shown in FIG. 18 is the same as the lamp 1E of the fifth embodiment except that the tip light emitting unit 9 is further provided. The tip light emitting unit 9 provided in the lamp 1J of the present embodiment is the same as the tip light emitting unit 9 provided in the lamp 1H of the eighth embodiment. According to the present embodiment, in addition to the same effects as in the fifth embodiment, the following effects can be obtained. By providing the tip light emitting part 9, not only the lamp outer peripheral direction but also the lamp tip direction can be sufficiently illuminated. That is, omnidirectional light distribution is possible.

Embodiment 10 FIG.
Next, the tenth embodiment of the present invention will be described with reference to FIG. 19. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 19 is a perspective view of the lamp according to the tenth embodiment of the present invention viewed from the oblique tip side. The lamp 1K of the tenth embodiment shown in FIG. 19 is the same as the lamp 1F of the sixth embodiment except that the tip light emitting unit 9 is further provided. The tip light emitting unit 9 provided in the lamp 1K of the present embodiment is the same as the tip light emitting unit 9 provided in the lamp 1H of the eighth embodiment. According to the present embodiment, in addition to the same effects as in the sixth embodiment, the following effects can be obtained. By providing the tip light emitting part 9, not only the lamp outer peripheral direction but also the lamp tip direction can be sufficiently illuminated. That is, omnidirectional light distribution is possible.

Embodiment 11 FIG.
Next, an eleventh embodiment of the present invention will be described with reference to FIG. 20. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be denoted by the same reference numerals and the description will be given. Simplify or omit. FIG. 20 is a perspective view of the lamp according to the eleventh embodiment of the present invention viewed from the oblique front end side. The lamp 1L of the eleventh embodiment shown in FIG. 20 is the same as the lamp 1E of the fifth embodiment except for the items described below.

  As shown in FIG. 20, in the lamp 1 </ b> L of the present embodiment, a hole through which the distal end portion of the light guide 4 g of the central light emitting unit 4 passes is formed in the center of the distal end side support 7. The distal end portion of the light guide 4 g of the central light emitting unit 4 passes through the hole of the distal end side support 7. Thereby, the front end surface of the light guide 4g is exposed. A part of the light incident on the base end of the light guide 4g from the LED light source 4a of the central light emitting unit 4 is guided to the tip of the light guide 4g and emitted from the tip surface of the light guide 4g in the tip direction. According to the present embodiment, in addition to the same effects as in the fifth embodiment, the following effects can be obtained. By emitting light from the tip surface of the light guide 4g, not only the lamp outer peripheral direction but also the lamp tip direction can be sufficiently illuminated. That is, omnidirectional light distribution is possible.

Embodiment 12 FIG.
Next, a twelfth embodiment of the present invention will be described with reference to FIG. 21. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 21 is a perspective view of the lamp according to the twelfth embodiment of the present invention viewed from the oblique front end side. The lamp 1M of the twelfth embodiment shown in FIG. 21 is the same as the lamp 1F of the sixth embodiment except for the items described below.

  As shown in FIG. 21, in the lamp 1 </ b> M of the present embodiment, a hole through which the tip of the light guide 4 g of the central light emitting unit 4 passes is formed in the center of the tip side support 7. The distal end portion of the light guide 4 g of the central light emitting unit 4 passes through the hole of the distal end side support 7. Thereby, the front end surface of the light guide 4g is exposed. A part of the light incident on the base end of the light guide 4g from the LED light source 4a of the central light emitting unit 4 is guided to the tip of the light guide 4g and emitted from the tip surface of the light guide 4g in the tip direction. According to the present embodiment, in addition to the same effects as in the sixth embodiment, the following effects can be obtained. By emitting light from the tip surface of the light guide 4g, not only the lamp outer peripheral direction but also the lamp tip direction can be sufficiently illuminated. That is, omnidirectional light distribution is possible.

  FIG. 22 is a perspective view showing a modification of the reflector 4e of the central light emitting unit 4 in the fourth embodiment (FIGS. 7 to 9). As shown in FIG. 22, as a modification of the fourth embodiment, the shape of the reflector 4e may be increased from the base end (one end) toward the tip end (the other end). By doing in this way, in the position near the base end of the reflector 4e near the LED light source 4a of the central light emitting unit 4, the ratio of the light reflected by the reflector 4e is small and the reflector is far from the LED light source 4a. At the position near the tip of 4e, the proportion of light reflected by the reflector 4e increases. For this reason, the brightness | luminance of the center light emission part 4 can further be equalized along a longitudinal direction.

  Further, the diffuse reflection part 4h of the central light emitting part 4 in the fifth embodiment (FIGS. 10 to 12) may be modified into the shape shown in FIG. By doing in this way, in the center light emission part 4, the efficiency in which the diffuse reflection part 4h (light control means) radiate | emits the light inside the light guide 4g from the side surface of the light guide 4g is from a base end (one end). It becomes larger toward the tip (the other end). That is, at the position near the base end of the light guide 4g near the LED light source 4a of the central light emitting unit 4, the efficiency of the diffuse reflection unit 4h to emit light inside the light guide 4g from the side surface of the light guide 4g is high. At a position close to the tip of the light guide 4g that is small and far from the LED light source 4a, the efficiency with which the diffuse reflection part 4h emits light inside the light guide 4g from the side surface of the light guide 4g increases. For this reason, the brightness | luminance of the center light emission part 4 can further be equalized along a longitudinal direction.

  Although illustration is omitted, as a modification of the central light emitting unit 4 in the sixth embodiment (FIGS. 13 and 14), the closer to the tip of the light guide 4g, the narrower the width of the diffuse reflection unit 4i (light control means). You may make it become. By doing in this way, the effect similar to the modification shown in FIG. 22 is acquired.

  FIG. 23 is a side view showing another modification of the light guide 4g and the light control means of the central light emitting unit 4 in the fifth embodiment (FIGS. 10 to 12) or the sixth embodiment (FIGS. 13 and 14). It is. A large number of particulate light diffusing fillers 4k are scattered inside the light guide 4g shown in FIG. The light diffusing filler 4k is an example of a light control unit that emits light from the side surface of the light guide 4g. As another modification of the central light emitting unit 4 in the fifth embodiment or the sixth embodiment, a light guide 4g shown in FIG. 23 provided with a light diffusing filler 4k as a light control means instead of the diffuse reflector 4h or 4i is used. Can be used.

  The addition density of the light diffusion filler 4k is relatively low on the base end side (lower side in FIG. 23) of the light guide 4g, and the light diffusion filler 4k is closer to the front end (upper side in FIG. 23) of the light guide 4g. The addition density of may be increased. By doing in this way, in the center light emission part 4, the efficiency which the light-diffusion filler 4k (light control means) radiate | emits the light inside the light guide 4g from the side surface of the light guide 4g is from a base end (one end). It becomes larger toward the tip (the other end). That is, at a position close to the base end of the light guide 4g near the LED light source 4a of the central light emitting unit 4, the light diffusion filler 4k has an efficiency of emitting light inside the light guide 4g from the side surface of the light guide 4g. At a position near the tip of the light guide 4g that is small and far from the LED light source 4a, the efficiency of the light diffusion filler 4k to emit the light inside the light guide 4g from the side surface of the light guide 4g increases. For this reason, the brightness | luminance of the center light emission part 4 can further be equalized along a longitudinal direction.

  As mentioned above, although embodiment of this invention was described, in this invention, it is possible to implement combining the characteristic of several embodiment mentioned above arbitrarily. Each component of the lamp of the present invention is not limited to the above-described embodiment. For example, a flexible organic EL substrate is used as a light source of the central light emitting unit 4, and the flexible organic EL substrate is disposed in a cylindrical shape, or an elongated organic EL substrate is disposed along the longitudinal direction of the central light emitting unit 4. It may be configured.

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1J, 1K, 1L, 1M lamp, 2 base, 3 base mounting part, 4 central light emitting part, 4a LED light source, 4b light source board, 4c heat sink, 4d Translucent cover, 4e reflector, 4f case, 4g light guide, 4h, 4i diffuse reflector, 4j light guide, 4k light diffusing filler, 5 side light emitting unit, 5a LED light source, 5b light source substrate, 5c heat sink, 5d translucent cover, 6 base end side support body, 7 distal end side support body, 8 central light emitting unit, 8a LED light source, 8b light source substrate, 8c heat sink, 8d translucent cover, 9 front end light emitting section, 9a LED light source, 9b Light source substrate, 9d Translucent cover

Claims (14)

A central light emitting unit having a light emitting element;
Three or more side light emitting units having light emitting elements;
With
The three or more side light emitting units are disposed around the central light emitting unit with a space between each other and the light emitting surface facing outward.
The lamp which the light radiate | emitted from the said center light emission part is radiated | emitted between the said side surface light emission units.   The lamp according to claim 1, wherein the luminous intensity of light traveling from the central light emitting unit toward the middle of the side light emitting units is higher than the luminous intensity of light traveling from the central light emitting unit toward the center of the back surface of the lateral light emitting unit. The central light emitting unit includes a plurality of central light emitting units having light emitting elements,
The lamp according to claim 1 or 2, wherein each of the central light emitting units is disposed with a light emitting surface facing the side light emitting units. Each of the central light emitting units includes a heat sink,
The lamp according to claim 3, wherein the plurality of central light emitting units are disposed with a space therebetween. A heat sink shared by the plurality of central light emitting units is provided,
The lamp of claim 3, wherein the heat sink has a hollow portion through which air can pass. The central light emitting unit has a reflector whose longitudinal direction is parallel to the lamp central axis,
The light emitting element of the central light emitting unit is disposed on one end side of the reflector,
The lamp according to claim 1, wherein the reflector reflects light emitted from the light emitting element of the central light emitting unit toward the side light emitting units. The central light emitting unit has a light guide whose longitudinal direction is parallel to the lamp central axis, and light control means for emitting light from the side surface of the light guide,
The lamp according to claim 1 or 2, wherein light emitted from the light emitting element of the central light emitting unit is incident on one end of the light guide.   The lamp according to claim 7, wherein the light control unit includes a diffuse reflection part that is provided inside the light guide and diffuses and reflects light.   The lamp according to claim 7, wherein the light control unit includes a diffuse reflection portion that is disposed on a side surface of the light guide so as to face a back surface of the side light emitting unit and diffuses and reflects light. The light guide has a cylindrical shape,
The lamp according to claim 7, wherein the light control unit has a light diffusion surface formed on one or both of an inner surface and an outer surface of the light guide. The light emitted from the light emitting element of the central light emitting unit is incident on the proximal end of the light guide,
The lamp according to any one of claims 7 to 10, wherein a part of the light incident on the light guide is emitted from a tip of the light guide.   The lamp according to any one of claims 1 to 11, further comprising: a light emitting element having a light emitting element, the light emitting surface being disposed with the light emitting surface facing the lamp front end side.   The lamp according to claim 6, wherein the reflector has a shape that increases from the one end toward the other end.   12. The efficiency of the light control means for emitting light inside the light guide from the side surface of the light guide increases from the one end to the other end of the light guide. The lamp according to any one of the above.

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